Migrating procmail recipes

I have been using imap with mbox format mail.  The new server is to us 
maildir, so all my recipes have to be migrated, and I'm having problems 
because I'm unsure of how maildir is handled in procmail.  Take this, 
for instance:

Old version - 

:0:
* ^To:.*design@xxxxxxxxxxx
{
  :0 c
  ! xxxx@xxxxxxxxxx

  :0
  ./Mail/Design
}
which worked as desired on the old, mbox, server.

New version -

MAILDIR=/home/anne/Maildir

:0:
* ^To:.*design@xxxxxxxxxxx
{
  :0 c
  ! xxxx@xxxxxxxxxx

  :0
  ./Maildir/Design/

This gives error messages such as

<anne@xxxxxxxxxxxxxxxxxxxxx> (expanded from <anne@localhost>): can't 
create user output file. Command output: procmail: Couldn't create  
"/var/mail/anne" /bin/sh: anne: No such file or directory procmail: 
Error     while writing to "/home/anne.pm.log" procmail: 

[3466] Fri Jan 27 10:48:22 2006 procmail: Assigning "LOGABSTRACT=YES" 
procmail: Match on "^To:.*design@xxxxxxxxxxx" procmail: Extraneous 
locallockfile ignored   # ##I have fixed that###

    procmail: Locking ".lock" procmail: Unlocking ".lock" procmail: 
Executing
    "/usr/sbin/sendmail,-oi,xxxx@xxxxxxxxxxx" procmail: Assigning
    "LASTFOLDER=/usr/sbin/sendmail -oi xxxx@xxxxxxxxxxx" procmail:
    Locking "./Maildir/Design/.lock" procmail: Error while writing to
    "./Maildir/Design/_K2%2pf2DB.packbell.lydgate.n" procmail: 
[3466] Fri Jan 27 10:48:30 2006 procmail: Locking 
"./Maildir/Design/.lock" procmail: Error while writing to 
"./Maildir/Design/_K2.-pf2DB.packbell.lydgate.n" procmail:
 [3466] Fri Jan 27 10:48:38 2006 procmail: Locking 
"./Maildir/Design/.lock"  procmail: Error while writing to    
"./Maildir/Design/_K2,-pf2DB.packbell.lydgate.n" procmail: 
<snip>

[3466] Fri Jan
    27 10:49:18 2006 procmail: Locking "./Maildir/Design/.lock" 
procmail: Error while writing to 
"./Maildir/Design/_K2+eqf2DB.packbell.lydgate.n" procmail:
    Lock failure on "./Maildir/Design/.lock" procmail: Unable to treat 
as directory "./Maildir/Design" procmail: Assigning    
"LASTFOLDER=./Maildir/Design" procmail: Opening "./Maildir/Design"
    procmail: Error while writing to "./Maildir/Design" procmail: 
Notified comsat: "anne@:**Bounced**" From cannewilson@xxxxxxxxxxxxx  
Fri Jan 27
    10:48:22 2006  Subject: Testing packbell's handling   Folder: 
**Bounced**
    2294

Ignoring the extraneous lockfile (now fixed) there seems to be two 
problems.  One refers to /var/spool/mail/anne.  Is that a left-over 
from mbox?  and if so, what do I need to edit?

The second is the Design folder.  On this workstation I see that as a 
sub-folder of Packbell's Inbox.  What is the syntax for moving mail to 
that folder?

Anne